The 21st International Conference on Ion Beam Analysis (IBA 21) will have the focus of analysis of advanced materials for energy and environment. Four Co-Chairs from National Laboratories of the Pacific Northwest, Sandia & Los Alamos will guide this biannual meeting of plenary talks, invited lectures and contributed presentations, including posters, with parallel sessions scheduled during the five day program. Over 300 attendees from around the world are expected to participate. Student involvement is strongly encouraged and financial support is being planned. A 2 day vendor exhibit is also planned. The conference proceedings will be published in NIM B (Nuclear Instruments and Methods in Physics Research Section B).